there are a lot of decent Doms out there who can make good mentors i know of a couple here who i would trust and recommend though im not going to presume and post their names..but as cadence mentioned, have you thought about a sub? one with a bit of experience under their belt sometimes that can make it easier,you'll probably feel less nervous,more likely to speak about and question anything you might be worried to ask a Dom and not only can a sub give the 'practical' advice but a different perspective ....from the subs side so to speak.

if you do find a Dom mentor.. watch out for anyone who tries to persuade you that you need to be actively playing with him unfortunately there are a few out there that will take advantage, perhaps you could ask around see if he is 'known' at all ? his character ...if he has a good reputation etc

you also cant be 'trained' as such.. its generally more of a guidance and support thing than 'lessons'